pvl_reindl1990

Determine sky diffuse irradiance on a tilted surface using Reindl's 1990 model.

Contents

Syntax

SkyDiffuse = pvl_reindl1990(SurfTilt, SurfAz, DHI, DNI, GHI, HExtra, SunZen, SunAz)

Description

Reindl's 1990 model ([1] equation 8, [2]) estimates the sky diffuse irradiance on a tilted surface using the surface tilt angle, surface azimuth angle, diffuse horizontal irradiance, direct normal irradiance, global horizontal irradiance, extraterrestrial irradiance, sun zenith angle, and sun azimuth angle.

Inputs

Output

Example

SurfTilt = 30;
SurfAz = 180;
DHI = 47;
DNI = 969;
GHI = 473;
HExtra = pvl_extraradiation(60);
SunZen = 60;
SunAz = 161;
SkyDiffuse = pvl_reindl1990(SurfTilt, SurfAz, DHI, DNI, GHI, HExtra,SunZen, SunAz)
SkyDiffuse =

   68.6801

References

[1] Loutzenhiser P.G. et. al. 2007. Empirical validation of models to compute solar irradiance on inclined surfaces for building energy simulation, Solar Energy vol. 81. pp. 254-267.

[2] Reindl, D.T., Beckmann, W.A., Duffie, J.A., 1990. Evaluation of hourly tilted surface radiation models. Solar Energy 45 (1), 9–17.

See Also

pvl_perez, pvl_grounddiffuse, pvl_klucher1979, pvl_haydavies1980, pvl_isotropicsky, pvl_kingdiffuse, pvl_extraradiation

Copyright 2014 Sandia National Laboratories